Are you behind a proxy? Run:

cpan

Then at the prompt:

o conf init /proxy/

[download]

Follow the prompts. The format of the HTTP Proxy is http://proxy.example.com:PORT. Put https if your proxy is SSL-enabled, and you can use the proxy IP instead of a domain name if it doesn't have one.

Continue through the prompts, then after you're done and back at the cpan command:

o conf commit

[download]

Then try cpan or cpanm again.

In reply to Re^7: can't locate crypt/RC4.pm in @inc by stevieb
in thread can't locate crypt/RC4.pm in @inc by ankit.tayal560

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